Kellin

Ezri Dax befriended him when she arrived on the planet in 2375. Kellin and Dax later worked together and found a way to move the Houdini mines and use them against the Dominion's Jem'Hadar troops on the planet.

After the Jem'Hadar began an assault on the Starfleet position, Kellin was killed, although he saved Ezri before being shot. (DS9episode: "The Siege of AR-558")